having to do with aquatic flora? (like unwanted plant life such as
salvinia that chokes waterways?)

>
> Sabik (Eta Ophiuchi)

having to do with waste and subversion of worthy efforts (say,
stem-cell research?)

>
> *Exclamation Mark Nebula (NGC 6309 Ophiuchi)

vehement, excited

>
>
>
>
>
>
> Saturn
>
>
>
> Chang (Upsilon-1 Hydrae)

a threat (possibly an armed threat)(?)

>
> Shir (Rho Leonis)

having to do with big cats? (like tigers in India)

>
> *SW Sextantis (cataclysmic variable aka nova)

things happening in the Southwest (maybe that boy who started the
brush fire near Los Angeles playing with matches, or that teacher from
Nebraska who had that relationship with a 13-year-old boy and fled to
Mexico with him, going through California; California is generally
considered Far West or West Coast, not Southwest, but it passed from
Mexican to US control after the US-Mexican War along with Arizona and
New Mexico, which are considered Southwestern states)